Device for computing the cost of engravings.



E. I. KRAMER.

DEVICE FOR COMPUTING THE COST 0F ENGRAVINGS.

APPLlcATloN FILED 050.29. 1914.

Patented Nov. 2, 1915.

coLUMmA PLANOGRAPH Co..w^sHlNu'|uN. D.C.

EDWARD I.` KRAMER, .OF NEW YORK, N. Y.

DEVICE FOR COMPUTING 'IFI-IE.V COST OF ENGRAVINGS.

Specification of Letters Patent.

Patented Nov. 2, 1915.

Application led December 29, 1914. Serial No. 879,508.V

To all whom t may concern:

Be it known that I, EDWARD I. KRAMER, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Devices for Computing the Cost of Engravings, of which the following is a specification.

This invention relates to squares and has for its object to provide one in which are means for enabling the cost of photowengravings, cuts, ete., to be computed by simpler calculations than heretofore have been necessary.

It has for a further object the provision of a square in which one arm is so constructed that slides bearing different price rates thereon may be used therewith.

TWith these objects in view, the invention is as represented in the drawing, in which- Figure 1 is a plan view of the square with one slide in place; Fig. 2 is an elevation of the slide showing the face opposite to that shown in Fig. 1; and Fig. 3 is a transverseV vertical section on line III-III of Fig. 1.

As shown, the square has two arms 1, Q, at right angles to each other, and preferably held together at adjacent ends by metal plates p, the arm 1 being pivoted between the plates je upon a pin 6.` By such a construction, the square may be compactly folded, as indicated by dotted lines in Fig. 1. rIhe arm 1 has two scales a, 6, thereon, scale a being an ordinary scale divided into inches and eighths, quarters, etc., while scale b is divided into inches and tenths of an inch.

rlhe arm 2 is provided centrally with a lon-V gitudinally extending groove 3, which is so cut as to form flange portions 3, 3 in said arm. A price-rate slide 4, of substantially the same shape as groove 3, is inserted in the groove between the flange portionsl3, 3, the latter acting as guiding members for the slide 4. The top of both the flange portions 3, 3 are preferably graduated in inches and tenths of an inch. The graduations on the right-hand flange portion 3, however, are continued inwardly to the edge of the groove 3. In the center of slide 4 there are graduations 5 every tenth of an inch, which are in alinement with those on the righthand flange portion 3 when the slide is in the proper position, as shown in Fig. 1. On both sides of the graduations 5 are figures d which denote the price of an engraving at the particular rate used, having a length equalto that indicated on the scale of theV iiange portion 3 opposite the particular price graduation, and of unit width. In Fig. 1, the rate scales shown are for 2O and 18 cents per unit length and breadth. The reverse side of the slide 4 may be provided with different rate scales, as shown in Fig. 2, where the rates are 14 and 6 cents, respectively. These four rates on the scale ordinarlly cover one entire field, comprising, for

instance, linecuts, half-tone squares, halfand saves space), one side can be used as a regular ruler and the other side as a tenths ruler. It is not only a rapid calculator, but on proofs of engravings that are silhouetted this ruler at once forms a rightangle and gives a basis to work upon.

To use the square, arm 1 is extended, and the slide, having thereon the particular price rate, is inserted in the groove 3 as far as it will go, with the priceescale on top, when the graduations thereon will be in alinement with those on the flange 3". The print, cut, etc., to-be measured is placed with its edges along the inner edges of the scale. To compute the cost of the engraving, its length in units and `fractions thereof and the price on the selected scale opposite this graduation are noted, and the latter multiplied by the number of units of width as noted on scale Z9. As for example, if it were required to find the cost of an engraving 7.4 inches wide by 6.3 inches long, at a rate of .18 dollar per square inch, the old method would require the multiplication of 7.4 6.3 .18. By the use of the present invention, the scale at once indicates that for a length of 6.3, the rate at .18 is 1.134, which when multiplied by 7.4, the width, at once gives the cost as $8.39.

I claim 1. In a device for computing costs depending upon the areas of rectangular figures, a square having on its arms gradua tionsrepresenting units of length, one of said arms having figures thereon opposite each graduation, each figure representing the'cost for an area of a figure of a length indicated opposite such graduations on said arm, and ot' unit breadth.k

2.' In a device for computing costs depending upon the areas of rectangular figures, a square having its arms graduated in units of length, a replaceable price-scale slide on one arm of said square, said pricescale slide havingv graduations thereon in alinement with those on'the square.

3. In avdevice' forV computing costs depending upon the areas ofrectangular iigures, a square having its arms graduated in unitsoi' length, a replaceable price-scale slide on one arm of said square, said pricescale slide having graduations thereon in alinem'ent with those on the square and lig- 'ures opposite each graduation, each ligure representing the cost for an area of a gure of a length' indicated opposite such graduation on the scale on said arm, and of unit breadth.

4; In'a device for computing costs depending upon the areas of rectangular ligures, a square havingY its arms graduated in units of length, flange portions on the upper side of one of said arms, and a replaceablevprice-scaley slide adapted to .be inserted in the arm of the square between said liange portions.

5. In a device for computing costs depending upon the areas of rectangular ligures, a square having its arms graduated in units of length, flange portions on the upper side of one of said arms, a replaceable price-scale slide inserted in the arm of the square between said llange portions, said price-scale slide having graduations thereon in alinement with those on the square.

6. In a device for computing the costs for engravings, a square having its arms graduated in units of length, flange portions on the upper side of one of said arms, bearing the graduations for that arm, a replaceable price-scale slide inserted in said arm between said flange portions, said price-scale slide having graduations thereon in alinement with those on the flange portions, and figures opposite the graduation, each ligure representing the cost for an area of engraving of a length indicated opposite such graduation on the scale on the flange portions, and of unit breadth.

In testimony whereof I atlix my signature in presence of two witnesses.

EDWARD I. KRAMER.

Witnesses:

W. W. GRESELE, J. B. HILL.

Copiesofthis patent may be obtained forv five cents each, by addressing the Commissioner of Patents.

" Y Y Washington, D. C. 

